(Cyclopropylmethyl)triphenylphosphonium bromide

Triphenylphosphine (3.9 g, 14.8 mmoles) was placed into a 300 mL round bottom flask, equipped with a condenser which was cooled with tap water. Dry benzene (100 mL) (distilled over sodium/benzophenone) was cannulated into the reaction vessel, and a positive pressure of argon and magnetic stirring were maintained throughout the reaction sequence. Cyclopropylmethyl bromide (2.0 g, 14.8 mmoles) was added to the solution via syringe. The reaction mixture was heated at reflux for 10 days producing insoluble cyclopropylmethyltriphenylphosphonium bromide.

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